The organisation will advise you in writing of its decision and has to advise you in writing of its decision and the reasons for its decision, including your right to make a complaint to the
Information Commissioner.

A review is taken to be refused if you are not notified of a
decision within 30 days. If you are not satisfied with the review decision, or if you receive no decision, you may make a complaint to the Information Commissioner.

You have 90 days from receiving the review decision to make your complaint.